A Time Called You (2023)

Han Jun Hee, still grieving the death of her boyfriend Ko Yeon Jun one year ago, is shocked to find herself suddenly transported back in time to 1998. In the past, she is Kwon Min Joo, a high school student. She soon meets Nam Si Heon, a popular and attractive student with an uncanny resemblance to her late Ko Yeon Jun. His best friend Jung In Kyu takes a liking to Kwon Min Joo, while she struggles with understanding her newfound connection to Nam Si Heon.